Android Device Manager is an extremely useful app for tracking and finding your lost or stolen phone, and now you can use it to give a friend a helping hand when their phone is lost as well. The latest update to the app gives you a "Guest" option in the account switcher menu, which then lets a friend log into their Google Account and track their Android devices. Once logged in they can track, ring and erase their phones just as if they were using the ADM website or an installed app on another one of their devices.
Having temporary access to someone else's Android device to track a lost or stolen device could mean the difference between finding it and never seeing it again, so we applaud Google's inclusion of this feature in the latest release. You can download the Android Device manager app at the Play Store link above — it may just save your (or someone else's) phone one day.